Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad5eb1574dc3578…

MALICIOUS

PDF

66.3 KB Created: 2021-02-18 19:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a818b8ee97dae538e48b279c87790755 SHA-1: 6db4bf72074af564169d0cd1fa44e848906f344f SHA-256: 0ad5eb1574dc35785747332bfb57fc0e142f2833db3a78d6357888c5e550aa10
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=scott+highlands+middle+school+mn In PDF document text
    • https://cdn.sqhk.co/nudekikusefi/eohij5w/78417919496.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/d3jiN2F/dimabujupegugab.pdfIn PDF document text
    • http://giocodigital.website/android_graph_view_plotting_libraryt1b1o.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/zolokerexoruti-rudekurope-pafagigatuf.pdfIn PDF document text
    • http://urologo.store/unlawful_detainer_answerav2pm.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/5idIjiI/34469080500.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/Vdge85W/bingo_games_free_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/vekotevudoze/hhelkMA/next_business_tycoon_3_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/upxiche/29939702483.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/16ae5238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5ff9177b2a6dc.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/wjeigiz/furia_de_titas_1981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_6023c918a794e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokorugagamozi.rf.gd/pegijisem.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/dental_hygiene_printable_worksheets.pdfIn PDF document text
    • http://janoweved.epizy.com/45670782742.pdfIn PDF document text
    • http://kujujigufa.epizy.com/xunusemufi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC771 5360 bytes
SHA-256: a20e0f8eb3c1b1a643f1266749900526ed087f3f3ec390a115e3aeff7c3a5ea4
font_01_sfnt_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 10216 bytes
SHA-256: 04105ee35807b923a60d7d5c9f75ee124f17a4bb8aae7cd76b19bc0e3b8a6ffb

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